COSMICS - A Browser Multiplayer Game

You are a hero and must save the world from cosmic alien invaders. There can be only one hero at a time.

COSMICS - A Browser Multiplayer Game
You are a hero and must save the world from cosmic alien invaders. There can be only one hero at a time. If there are more aspirants they have to queue up as spectators.
Each spectator can help with balloons to fight the invaders (or irritate the hero) and must try to stay alive. A dying spectator means to fall back to the taillight of the next hero queue.
HERO: left:left, right:right, up/s:jump, a:shoot
SPECTATOR: left:left, right:right, up/s:jump, a:launch balloon
Full Instructions and scores:
http://yo-code.de/cosmics/